Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Johns Hopkins University
Skills you'll gain: Apache Hadoop, File Systems, Big Data, Java, Data Structures, Infrastructure Architecture, File Management, Systems Architecture, Data Processing, Distributed Computing, Data Storage, Development Environment, Scalability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: AWS Identity and Access Management (IAM), Identity and Access Management, Amazon Web Services, Role-Based Access Control (RBAC), Authorization (Computing), User Accounts, Cloud Security, Data Security, Cloud Platforms, Command-Line Interface
Intermediate · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Big Data, Analytics, Data Processing, Data Analysis, Data Strategy, Data Lakes, Data Storage, Data Warehousing, Data Management, Data Infrastructure, Data Architecture, Data Capture, Unstructured Data, Real Time Data
Mixed · Course · 1 - 4 Weeks

Northeastern University
Skills you'll gain: Java, Object Oriented Programming (OOP), Data Structures, Object Oriented Design, Event-Driven Programming, Computer Programming, Application Design, Programming Principles, Application Development, User Interface (UI), User Interface (UI) Design, Integrated Development Environments, Software Development
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Jenkins, Selenium (Software), GitHub, Git (Version Control System), Performance Testing, Continuous Integration, CI/CD, Apache Maven, Version Control, Java Programming, Test Automation, Object Oriented Programming (OOP), Software Testing, Integration Testing, Browser Compatibility, MySQL Workbench, JSON
Intermediate · Course · 3 - 6 Months

LearnQuest
Skills you'll gain: Data Analysis, Analytics, Statistical Analysis, Data Mining, Spreadsheet Software, Exploratory Data Analysis, Descriptive Analytics, Quantitative Research, Data Cleansing, Data Processing, Data Collection, Statistics, R (Software), Predictive Analytics, Query Languages, Data Visualization, Data Visualization Software, SQL
Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Compliance Management, Risk Analysis
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Blockchain, Threat Modeling, Application Security, Computer Security, Security Controls, Cybersecurity, Security Engineering, Data Security, Network Security, Information Systems Security, Cryptography, Vulnerability Assessments, Secure Coding, Cryptographic Protocols, Encryption, Key Management, Risk Management, Public Key Cryptography Standards (PKCS), Data Integrity, Distributed Computing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Responsible AI, Machine Learning, Data Ethics, Predictive Analytics, Statistical Modeling, Supervised Learning, Artificial Intelligence and Machine Learning (AI/ML), Data Science, Machine Learning Algorithms, Decision Tree Learning, Data Analysis, Regression Analysis, Performance Analysis, Deep Learning, Artificial Neural Networks
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Generative AI Agents, LLM Application, Agentic systems, Artificial Intelligence and Machine Learning (AI/ML), Generative AI, Artificial Intelligence, Tool Calling, AI Product Strategy, Large Language Modeling, Responsible AI, Decision Support Systems, Application Deployment, Performance Testing
Intermediate · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Mathematical Modeling, Software Systems, Mechanical Engineering, Systems Analysis, Systems Engineering, Applied Mathematics, Differential Equations, Hardware Architecture, Verification And Validation, Linear Algebra
Build toward a degree
Intermediate · Course · 1 - 4 Weeks
University of Michigan
Skills you'll gain: Student-Centred Learning, Education and Training, Teaching, Adult Learning Principles, Community Development, Instructional Design, Social Justice, Student Engagement, Diversity Equity and Inclusion Initiatives, Cultural Sensitivity, Time Management
Beginner · Course · 1 - 4 Weeks